Sony Computer Entertainment said on Tuesday it was buying Sucker Punch Productions, the studio behind the "inFamous" franchise, as Sony's unit tries to expand its portfolio of original video games.

Based in Bellevue, Washington, Sucker Punch Productions is the developer of the Sly Cooper series for the PlayStation 2 computer entertainment system and the inFamous franchise on the PlayStation 3 computer entertainment system, with combined franchise sales surpassing seven million units worldwide.

Sony said that after the acquisition, Sucker Punch will keep its current management team and company founders in conjunction with SCE WWS Foster City Studio. Financial terms of this arrangement are not disclosed.

"Sucker Punch Productions is one of the most highly acclaimed development studios in the industry and we have enjoyed a wonderful relationship with the company for over 12 years. We are delighted to officially welcome them to the SCE family," said Shuhei Yoshida, president, SCE WWS. "The addition of Sucker Punch to SCE WWS reiterates our dedication to developing world class gaming experiences that can only be found on the PlayStation platform. With one of the strongest exclusive software lineups in the PS3?s history, combined with the diverse, innovate content in the works for PlayStation Vita, consumers have a lot to be excited about this year."

"We've enjoyed an incredible relationship with Sony that has allowed us to combine our creative design capabilities with their guidance to make some of the best franchises to hit the PlayStation platforms. Equally important, the relationship with SCE has provided us the flexibility and trust to take creative risks and invent new properties," said Brian Fleming, managing partner, Sucker Punch Productions. "As a part of the Sony Computer Entertainment group we look forward to introducing more innovative content and providing consumers with exciting, new interactive exeriences."

Sucker Punch's action adventure game, "inFamous 2," was the top selling software title in June, according to research firm NPD.